আমরা জানি,
1² + 2² + 3² + 4² + ........... + n² = (1/6){n(n + 1)(2n + 1)}

1² + 2² + 3² + 4² + ........... + 10² = (1/6){10(10 + 1)(2 × 10 + 1)}
= (10 × 11 × 21)/6
= 385